Groups > linux.kernel > #1419387

Re: x86: bad pte in pageattr_test

From	Dmitry Vyukov <dvyukov@google.com>
Newsgroups	linux.kernel
Subject	Re: x86: bad pte in pageattr_test
Date	2016-06-10 15:10 +0200
Message-ID	<rIumf-4YI-47@gated-at.bofh.it> (permalink)
References	(1 earlier) <rHlEm-Wz-15@gated-at.bofh.it> <rHlEm-Wz-19@gated-at.bofh.it> <rIfQf-3Cu-75@gated-at.bofh.it> <rIrHH-3il-19@gated-at.bofh.it> <rIucy-4Ga-35@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Jun 10, 2016 at 2:54 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Fri, 10 Jun 2016, Dmitry Vyukov wrote:
>> Here is the second log:
>> https://gist.githubusercontent.com/dvyukov/dd7970a5daaa7a30f6d37fa5592b56de/raw/f29182024538e604c95d989f7b398816c3c595dc/gistfile1.txt
>>
>> I've hit only twice. The first time I tried hard to reproduce it, with
>> no success. So unfortunately that's all we have.
>>
>> Re logs: my setup executes up to 16 programs in parallel. So for
>> normal BUGs any of the preceding 16 programs can be guilty. But since
>> this check is asynchronous, it can be just any preceding program in
>> the log.
>
> Ok.
>
>> I would expect that it is triggered by some rarely-executing poorly
>> tested code. Maybe mmap of some device?
>
> That's the mmap(dev) list which is common between the two log files:
>
> vcsn
> ircomm
> rfkill
> userio
> dspn
> mice
> midi
> sndpcmc
> hidraw0
> vga_arbiter
> lightnvm
> sr
>
> Dunno, if that's the right direction, but exposing these a bit more might be
> worth to try.


I am now running both of these logs for several hours (2.5M
executions). No failures so far...

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Re: x86: bad pte in pageattr_test Dmitry Vyukov <dvyukov@google.com> - 2016-06-07 11:40 +0200
  Re: x86: bad pte in pageattr_test Thomas Gleixner <tglx@linutronix.de> - 2016-06-09 23:40 +0200
    Re: x86: bad pte in pageattr_test Dmitry Vyukov <dvyukov@google.com> - 2016-06-10 12:20 +0200
      Re: x86: bad pte in pageattr_test Thomas Gleixner <tglx@linutronix.de> - 2016-06-10 15:00 +0200
        Re: x86: bad pte in pageattr_test Dmitry Vyukov <dvyukov@google.com> - 2016-06-10 15:10 +0200

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